Voltaic-arc lamp



I (No Model.)

0. A. MOSES.

VOLTAIC ARC LAMP.

I u I u I I 2 "It u i: 3 i 2 INVENTOR:

Patented May 1,1883.

AT TEE: T:

UNITED STATES PATENT OFFICE.

OTTO A. MOSES, OF NEW YORK, N. Y.

VOLTAIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 276,705, dated May 1,1883, Application filed October 26,1882. (No model.)

To all whom it may concern:

Be itknown that I, O'r'ro A. Moses, of New York city, in the county andState of New York, have invented a certain new and useful Improvement inVoltaic-Arc Lamps, of which the following is a specification.

The object I have in view is to produce a simple and efficientregulating mechanism for arc-lainps, wherein the upper or positivecarbon only is fed forward, which mechanism will act positively to liftthe upper carbon in establishing the arc, and to force it downwardlywhen the arc is broken to complete the circuit, and will also permit ofa uniform and steady gravity-teed of the upper carbon, controlled by thelengthening of the are.

A further object is to produce convenient means for holding the lowercarbon so that it can be readily brought into line with the upper carbonand held rigidly in position.

Constructions embodying the invention are shown in the accompanyingdrawings,in which Figure l is a vertical section of the principaloperating parts of an arc-lamp; Fig. 2, a vertical section of a portionof the carbon-carrying tube and iuclosed parts, showing a modiiiedarrangement of the parts; Fig. 3, a top view of the assisting magneticintensifier and clamp; Fig. 4, a sectional view of the regulatingdash-pot, and Fi 5 a vertical section and partial elevation of thedevice for holding and centering the lower carbon.

A is a solenoid or hollow electromagnct, the coils of which areconnected in series with the carbon electrodes B B of the lamp, andwhich alone operates the regulating mechanism. The tube 0, carrying theupper or positive carbon, B, passes through this solenoid orelectrdmagnet, and is guided therein. It is filled with glycerine orother suitable viscous liquid, D, and passes up within thesupporting-tube E, rising from the head o't'A.

F is a rod supported by a spiral spring, G, which is secured to the tubeE, and is connected adjustably with the rod F by a block, a, andset-screw b. or armature H of the solenoid or electromagnet, such coreor armature being sleeved or held loosely upon the rod.

Above H is secured rigidly to the rod F a The rod F carries the core,

block, I, of magnetic or non-magnetic material, which block is beveledon its lower side next to the core or armature, one or more balls, K,preferably otnon-magnetic metal, beinglocated in the wedge shaped spacebetween the flat upper end of the core and beveled lower face of theblock. The core orarmature is held up in active position by a spring, 0,and adjusta ble nut (l on the lower end of rod F. The pressure of thespring 0, while holding the balls K out against the tube 0, maintainingelectrical contact constantly therewith, is not sufficient to preventsuch tube from dropping by gravity, its movement being retarded by thefriction of the balls, as well as by the liquid within the tube, and theregulating dash-pot about to be described. When the circuit to the lampis completed the core II will be drawn up with a quick forciblemovement. This willjam the balls K out against thetube G, clamping thecore to the tube. In this quick forcible movement the magnetic clampformed by the balls might not be certain in its action. The vviscousliquid 1), however, by reason of the atmospheric pressure thereon andthe limited passage-way through whichit can' flow around the core,causes the core and tube to move as one, and the tube is carried up withthe core against the resilience of the spring Gr, separating the carbonelectrodes and establishing the arc. The lengthening of the arc causesthe core to diminish the pressure on the balls and to release the tube(J, and also permits the spring G to actdownwardly, and between thesetwo actions the upper carbon is given a regular downward movement. Itthe are, however, should be broken or be unduly lengthened by thesticking otthe tube in its guides, the spring Gr would act to give therod and core a quick and forcible downward movement, and the carbon-car'ying tube would be carried with the core through the medium oi theliquid.

To produce a uniform movement of the core or armature, the additionaldash-pot Sshown in Fig.4 is en'iployed. For this purpose thesupporting-tube E is extended upwardly and provided with a cop, 0, fromthe center of'which is suspended a hollow cylindrical dash-pot plunger,1;, open atits lower end and closed at a ere-area its upper end, withthe exception of the small air-holes g. This plunger works in thecylindrical vessel a, partly filled with glycerine, S, or other suitableviscous liquid. The vessel 1' is attached to the upper end of the rod Iand the dash-pot thus makes uniform the movement of said rod, caused bythe solenoid or electro-magnet and the spring G.

The parts thus far described form a complete and effieiently-operatingregulating mechanism. They may be assisted, however, by a magneticintensifier and clamp, L, external to the carbon-holding tube, composedof balls or rollers 0, held by a ring, f, and having an independentmovement thereon to a small extent. This magnetic clamping-ringsurrounds the tube G below A, and is limited in its vertical movement byarms g or a suitable cage. In the arrangement shown in Fig. 1 the ringof balls located below the core serves to lengthen such core andintensify the action of the solenoid or throw the magnetic center of thecore down to a lower point. The halls are all attracted inwardly by thecore clamping evenly upon the carbon-carrying tube, and, being attractedupwardly by the solenoid, they serve to assist in raising thecarbon-carrying tube, forming an external magnetic clamp, acting inconjunction with the internal magnetic clamp formed by the balls K. Thisdivided magnetic clamping-ring may be used with the arrangement shown inFig. 2, in which the balls K are brought down to a point opposite thering, the internal and external clamps acting upon the carbon-holdingtube opposite each other. To do this the block M, corresponding to I, isextended downwardly, and is made magnetic, so as to form a part of thecore or armature, the movable part N of the core or armature being madeshorter than in Fig. 1. With this arrangement it is desir able that thecore should extend above the solenoid the same distance thatit extendsbelow such solenoid.

To hold and center the lower carbon, B, I provide a socket, 0, having aclamp to hold the carbon, which is preferably a ring, h, turning uponthe split end i of the socket. This socket has a disk, P, provided witha concave lower side, 7:, and a screw-shank, 1, extending downwardlyfrom the center at this disk. The shank 1 passes through an opening, m,in the lower cross-piece, Q, of the lamp-frame, the opening on beinglarge enough to permit the shank to be moved laterally a limited extentin any direction. A. disk, It, having a concave upper side, a, screwsonto the lower end of the shank l, and impinges against thelower side ofthe cross-piece O. The concave faces of the disks assure the rigidholding of the parts, while the opening at allows the lower carbon to bebrought into line with the upper carbon.

hat I claim is- 1. In regulators for arc-lamps, the combina tion, withthe solenoid or electro-maguet, of the carbon carrying tube, the core orarmature within such tube, and a clamp operated by the movement of suchcore or armature and acting upon the interior of said tube,substantially as set forth.

2. In regulators for arc-lamps, the combination,with the solenoidorelectro-magnet, ot' the carbon-carrying tube, the liquid within suchtube, the core orarmature also within such tube, and a clamp operated bythe movementof such core or armature and acting upon the interior ofsaid tube, substantially as set forth.

3. In regulators for arc-lamps, the combination, with the solenoid orelectro-magnet, of the carbon-carrying tube, the spring-rod, the core orarmature movable upon such rod, and a clamp operated by the movement ofthe core or armature on the rod, substantially as set forth.

4. ln regulators for arc-lamps, the combination, with the solenoid orelectromagnet, of the carbon-carrying ube, the spring-rod, the beveledblock secured to such rod, the core or armature movable upon the rod,and the clamping-balls, substantially as set forth.

5. In regulators for arc-lamps, the combina tion,with thecarbon-carrying tube and springrod, of the beveled block secured to suchrod, the core or armature movable upon such rod, the clamping-balls, andthe spring and adjusting-nut, substantially as set forth.

6. In regulators for arc-lamps, the combination, with the solenoid orelectro-magnet, of the carbon-carrying tube, the core or armature withinsuch tube, the magnetic clamp within the tube, and the dash-potregulating the movement of the core or armature, substantially as setforth.

7. In regulators for arc-lamps, the combination, with the solenoid orvelectro-magnet, ot' the carbon-carrying tube, the liquid within suchtube, the core or armature also within such tube, the magnetic clampalso within such tube, the spring forcing the core or armaturedownwardly, and the dash-pot regulating the movement of the core orarmature, substantially as set forth.

8. In regulators for arc-lamps, the combination, with the solenoid orelectro-magnct, of the carbon-carrying tube, the spring-rod within suchtube, the core or armature mounted loosely on said rod, the clampoperated by the movement of the core or armature on the rod, and thedaslrpot connected with such rod, substantially as set forth,

9. In regulators for -arc-lamps, the combination, with thecarbon-carrying tube and the magnetic clamp within the same, of theexternal magnetic clamp, substantially as set forth.

10. In regulators for arc-lamps, the combination, with thecarbon-carrying.tube, of the clamping-balls within the same and the external divided magnetic clamping-ring, substantially as set forth.

11. In arc-lamps, the combination, with the This specification signedand witnessed this IO frame having opening, of the socket for the llthday of October, 1882. lower carbon provided with a clamping device forsecuring the carbon therein, the shank or OTTO A, MOSES. bolt smallerthan the frame-opening, and the concave disks securing the carbon-socketto Witnesses:

the frame independent of the device for bold B10111). N. DYER, ing thecarbon in such socket, substantially as H. V. SEELY. set forth. l

